Oil-well pumping mechanism



(No Model.)

O. A. KNOX.

OIL WELL PUMPING MBGHANISM. No. 482,011. Patented Sept. 6, 1892.

r il

@ffy

:ns co., mummia.. vnsnmcn-ou, n. c.

UNITED STATES PATENT OFFICE.

ORRIN A. KNOX, OF BRADFORD, PENNSYLVANIA.

OIL-WELL PUMPING MECHANISIVI.

SPECIFICATION forming part of Letters Patent N 0. 482,011, dated September 6, 1892.

Application filed May 21, 1891. Renewed August 2, 1892. Serial No. 441.970. (No model.)

To all wwm it may concern:

Be it known that l, OREIN A. KNox, a citizen of the United States, residing at Bradford, in the county of McKean and State of Pennsylvania, have invented certain new and useful Improvements in Oil-Vell Pumping Mechanism; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, forming part of this specification.

My invention consists in the improvements in oil-well pumping mechanism hereinafter set forth and explained, and illustrated in the accompanying drawings, in which- Figure 1 is a sectional view of an oil-well pump embodying myinvention. Fig. 2 shows a sectional view of amodiiication of the same.

The objects of my invention are, first, to provide an oil-well pump with a perforated outside casingsurrounding the workingbarrel, through which the oil will drain to the pump; second, to so connect said perforated shell with the tubing above the working barrel of the pump that it can be lowered to the bottom of the well and lifted out of the well by means of the tubing, yet when in place will rest upon the bottom of the well instead of being suspended from the tubing. Other features of my invention appear hereinafter in the specification and claim.

In the construction of my invention shown in the drawings, A is the working barrel of the pump; B, a short section of tubing secured to the upper end thereof by means of a thimble a, and C the upper section or sections of the tubing coupled to theupper end of the section B by a thimble o and reaching thence to the top of the well, from which tubing the working barrel A is suspended when in place in the well. y

D is the standing Valve in the lower end of the Working barrel A, E the suction or lifting valve of the pump, and F the sucker-rod secured to the lifting-valve E and extending to the top of the well, and by means whereof the valve E is operated in the working barrel A, all of these parts being of usual and ordithe outside of the working barrel A. I secure the pipe H in the collar G, preferably by screwing it therein; but the collar G can be made integral with the pipe H, if desired. The pipe H, I perforate with small holes h, preferably throughout its entire length to the bottom of the well, as illustrated in Fig. 1. I can, however, if desired, extend the perforated pipe H some distance downward and then couple thereto a pipe I, which extends down to and rests upon the bottom of the well, as illustrated in Fig. 2. In either case the loose sand in the well is kept away from and out of contact with the working barrel A by means of the perforated pipe H, the oil, however, passing through the perforations h to the pump.

In operation, the perforated pipe His secured in place around the working barrel A by means of the collar Glpassing over the section B of tubing, and is lowered into the well until the lower end of the perforated pipe H or of a tube-section I on the lower end thereof rests upon the bottom ofthe well. The tubing B and working barrel A on the lower end thereof are then lowered down until the collar G is preferably about midway between the thimbles a and b, so that the weight of the perforated pipe I-I rests entirely upon the bottom of the well. When, however, it is necessary at any time to draw the tubing from the well, the thimble d at the upper end of the working barrel engages with the collar G as the tubing is raised and draws the perforated pipe H out of the well therewith.

Having thus fully described my invention, so as to enable others to construct and use the same, what I claim as new, and desire to secure by Letters Patent of the United States, 1s-

The combination, in an oil-well pumping mechanism, of a working barrel A and tubesections B C, secured thereto and extending In testimony whereof I affix my signature in upward out of the well, with a perforated tube presence of two witnesses. H, surrounding the working barrel A, and a collar G on the upper end of the perforated ORRIN A. KNOX. 5 pipe H, surrounding the tube-section between Witnesses:

thimbles or collars a and b thereon, substan- GEO. A. STURGEON,

tztlly as and for the purpose set forth. LESTER II. SIMONS. 

